Parts for your 2016 Subaru Impreza-Tx valve

2016 Subaru Impreza TX Valve: What it Does and When to Service It

Yes — the 2016 Subaru Impreza uses a thermostatic expansion valve (TX valve) in its air-conditioning system. This is documented in Subaru’s factory service information for the GP/GJ chassis A/C system (HVAC section), which details TX valve removal and installation at the evaporator. Genuine parts catalogues also list a dedicated “Valve–Expansion” for 2012–2016 Impreza models (commonly referenced as 73520FJ000), and major A/C component catalogues from OEM suppliers list a matching expansion valve for this vehicle. These technical sources confirm the TX valve is fitted and serviceable on this model.

In simple terms, the TX valve meters how much refrigerant flows into the evaporator, reacting to temperature and pressure so the A/C cools efficiently without icing. It’s the traffic controller of the Impreza’s climate system — too little flow and the cabin struggles to cool, too much and the evaporator can freeze up.

Common signs the TX valve is playing up include weak cooling at idle that improves on the open road, fluctuating vent temperatures, hissing at the dash, or pressure readings that don’t settle during diagnosis. In colder weather, a sticking valve can even let the evaporator frost over, then thaw, then frost again — not ideal for comfort or demister performance.

There’s no routine “maintenance” for a TX valve, but good A/C hygiene helps it live a long life. Keeping the cabin filter fresh, the condenser clean, and the refrigerant charge at the specified weight all reduce the valve’s workload. If the system has been open to atmosphere, the valve can corrode or clog with debris and may be worth replacing alongside other components.

When replacement is on the cards, treat it as a professional job. In Australia and New Zealand, refrigerant recovery and recharging must be done by a licenced technician (ARCtick in AU). Best practice is to replace the receiver–drier or desiccant element as specified for the car, renew the correct A/C O-rings, evacuate the system to deep vacuum, and recharge strictly to the factory mass shown on the under‑bonnet label with the correct oil type to suit the DENSO compressor. Follow the Subaru service manual for valve access at the evaporator case, bead‑seat cleanliness, and bolt torque. Done right, the Impreza’s TX valve helps keep cabin temps chill and fuel use tidy all summer long.

• Tip: If major compressor failure has peppered the system with debris, a TX valve replacement plus condenser/drier service and thorough flushing is smart insurance.

Popular questions about the 2016 Subaru Impreza TX valve

Where is the TX valve located on a 2016 Impreza?
It’s mounted at the evaporator inlet inside the HVAC case, accessed from the passenger side behind the dash. Subaru’s service info outlines removing trim and lines to reach the valve and replace the O‑rings.

Does the TX valve need regular servicing?
No regular servicing is required. It’s replaced if faulty or when contamination risk is high. Keeping the refrigerant charge correct, the cabin filter clean, and the system sealed extends its lifespan.

What else should be replaced with a TX valve?
Technicians typically fit new A/C O‑rings, and renew the receiver–drier or desiccant element as specified. After reassembly, the system is evacuated and recharged by weight using the refrigerant and oil type specified on the bonnet label.